Piperidine → (R)-2-(2-((4-amino-3-(4-(2,3-difluorophenoxy)-2-fluorophenyl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl)methyl)pyrrolidine-1-carbonyl)-3-cyclopropylacrylonitrile

Participants

Reaction Steps

A solution of 3-((R)-2-((4-amino-3-(4-(2,3-difluorophenoxy)-2-fluorophenyl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl)methyl)pyrrolidin-1-yl)-3-oxopropanenitrile (240 mg, 0.47 mmol, 1.00 equiv), cyclopropanecarbaldehyde (98.7 mg, 1.41 mmol, 3.00 equiv) and piperidine (42 mg, 0.47 mmol, 1.00 equiv) in ethanol (15 mL) was stirred for 3 h at 65° C. The resulting mixture was concentrated under vacuum. The residue was purified on Prep-HPLC. Conditions: (1#-Pre-HPLC-001(SHIMADZU)): Column, SunFire Prep C18, 19*150 mm 5 um; mobile phase, water with 0.05% TFA and CH3CN (40% CH3CN up to 100% in 20 min); Detector, 254 nm. This resulted in 100 mg (36%) of the title compound as a white solid. MS (ESI, pos. ion) m/z: 560 (M+1) H-NMR (400 MHz, CD3OD, ppm): 8.36 (s, 1H), 7.68-7.65 (t, J=7.6 Hz, 1H), 7.30-7.20 (m, 2H), 7.14-7.11 (t, 1H), 7.03-7.00 (d, J=9.2 Hz, 2H), 6.58 (d, J=10.8 Hz, 1H), 4.92-4.87 (m, 1H) 3.65-3.60 (m, 1H), 3.50-3.46 (m, 1H), 2.14 (m, 1H), 1.99-1.81 (m, 4H), 1.24-1.23 (m, 2H), 0.93-0.77 (m, 2H).

Provenance & Evidence